Daphnia are tiny crustaceans, or "water fleas," that are extremely adaptable to their environment. This is due to their ...

This is a mature Daphnia magna imaged under a microscope at 20x magnification. The photo was taken at the end of the 21 day exposure to sunscreen so that we could measure its body length.

Researchers studied Daphnia pulex, a zooplankton also known as the common water flea. The tiny organisms are found in ...